Re: [post LSFMM summary] where is fuse going?

[Gao Xiang <hsiangkao@linux.alibaba.com>]

On 2026/5/13 05:40, Amir Goldstein wrote:
> On Tue, May 12, 2026 at 12:01 PM Miklos Szeredi <miklos@szeredi.hu> wrote:
>>
>> On Tue, 12 May 2026 at 09:53, Amir Goldstein <amir73il@gmail.com> wrote:
>>
>>> The problem is only with  fuse_passthrough_mmap().
>>> Depending on the workload (?) mmap may not be important and
>>> we could fail if trying to map cross-backing-id regions.
>>
>> mmap(2) is the main entry point into famfs,  so it's very important.
>>
>> That doesn't work with "traditional" passthrough and needs to do the
>> DAX mapping that famfs currently does.
>>
> 
> Yes, famfs surely needs mmap to multiple daxdev and this is done.
> 
> I was referring to Gao's question about dealing with non-dax multi
> backing id (const mapped) files.

Yes, it can work on DAX and my question was all about
mmap backed by multiple pagecache-backed files.

Thanks,
Gao Xiang

> 
> Thanks,
> Amir.